[GIF] Good Vibrations (Chladni patterns on the disk)

In the same spirit as The Band Plays On, here are Chladni patterns (which is to say: the nodal lines) for a family of vibration modes on the disk interpolating between the
$(2,3)$ mode and the
$(3,2)$ mode. ContourPlot is pretty slow for this, so rather than an unresponsive Manipulate, here's the code for generating the GIF: